[Answered ]-Bluemix : code for hash md5 was not found

This issue would be due to the buildpack cache that would be present on your existing app. Bluemix changed the default stack from lucid64 to cflinuxfs2 so the existing buildpack would have been ‘compiled’ against the old stack. When obtaining this cached buildpack and running on cflinuxfs2 you would see these issues.

Please delete the existing app from Bluemix using the cf delete appname command and then push the app again. You should see output indicating a new app is created and the buildpack is built again rather than being retrieved from the cache.